Automotive electric/electronic package

Inactive Publication Date: 2009-04-02
SHIN ETSU CHEM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0024]In the automotive electric/electronic package of the invention, the fluorochemical adhesive or encapsulant protects any electronic component, typically a hybrid IC board, received in the

Problems solved by technology

This silicone resin composition is effective for adsorbing corrosive gases, but can be swollen or degraded by gasoline, engine oil or the like to which it is often exposed when mounted on vehicles.
The composition is thus unsuited

Method used

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  • Automotive electric/electronic package
  • Automotive electric/electronic package
  • Automotive electric/electronic package

Examples

Experimental program
Comparison scheme
Effect test

example

[0107]Examples are given below by way of illustration and not by way of limitation. Note that all parts (pbw) and % are by weight.

preparation examples 1 and 2

[0108]Using the ingredients identified below, perfluoropolyether rubber and gel compositions were prepared as formulated in Table 1.

[0109]The rubber and gel compositions were cured under conditions of 150° C. and 1 hour, following which the hardness of the cured products was measured. The results are also shown in Table 1.

Ingredients

[0110]

TABLE 1(a) Inorganic powder(a-1) copper powder (flake), 3L3 by Fukuda Metal Foil Industry Co.,Ltd.(a-2) synthetic hydrotalcite, Kyoward 500 by Kyowa Chemical IndustryCo., Ltd.(b) Perfluoropolyether oil(b-3)CF3O—(CF2CF2CF2O)e—C2F5e = 27(c) Hydrosiloxane(c-2)(d) Catalyst, toluene solution of platinum-divinyltetra-methyldisiloxanecomplex (platinum content 0.5%)(e) Curing regulator, 50% toluene solution of ethynyl cyclohexanolCompositionIngredients (pbw)12a-1Cu powder (flake)5a-2Kyoward 5002b-1Perfluoropolyether 110055b-2Perfluoropolyether 220b-3Perfluoropolyether 325c-1Hydrosiloxane 12c-2Hydrosiloxane 220dPt compound0.20.12eCuring regulator0.30.15JIS ...

example 1

[0111]The perfluoropolyether rubber composition (Composition 1) prepared above was used as an adhesive to provide bonds 4 between base 2 and case 3, between case 3 and lid 5, and between base 2 and substrate 6 in FIG. 1, completing an automotive electric / electronic package as shown in FIG. 1. Note that the circuit 1 on substrate 6 which is received within case 3 and bonded to base 2 is formed using a silver paste.

[0112]This package was held in an atmosphere of 5% hydrogen sulfide (H2S) for one month. Thereafter, with lid 5 removed, the state of the circuit 1 was observed, finding no corrosion on the circuit 1.

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Abstract

In an automotive electric/electronic package comprising an electronic component, a case for receiving the electronic component therein, and a lid covering an open top of the case, the case and the lid are joined together with a fluorochemical adhesive capable of chemically and/or physically adsorbing a corrosive gas. The package has highly reliable corrosion resistance in that the electronic component is protected from corrosion by corrosive acidic or basic gases such as sulfur compound and nitrogen oxide gases.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This non-provisional application claims priority under 35 U.S.C. §119(a) on Patent Application No. 2007-253828 filed in Japan on Sep. 28, 2007, the entire contents of which are hereby incorporated by reference.TECHNICAL FIELD[0002]This invention relates to automotive electric / electronic packages. Typical automotive electric / electronic packages are sensors installed in the engine compartment and comprising sensing elements for detecting various physical quantities, an electronic circuit for controlling the sensing elements, and output elements for delivering electrical signals corresponding to the physical quantities, and control units comprising a microprocessor for controlling various states in the vehicle in response to the electrical signals from the sensors.BACKGROUND ART[0003]In the prior art, automotive electric / electronic packages are typically used in the encapsulated structure and implemented as physical detectors and controllers ...

Claims

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Application Information

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IPC IPC(8): H05K5/03
CPCC08G65/007C08G65/336C08G2650/48C08L71/02C09J171/02G01D11/245H01L23/10H01L2224/8592H01L23/26H01L2224/48091H01L2224/73265H01L2924/00014H01L2924/16195H01L2924/181
Inventor FUKUDA, KENICHISHIONO, MIKIO
Owner SHIN ETSU CHEM IND CO LTD
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